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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1727 (Instrument Panel, Gages, And Console) >> Diagnostic Information and Procedures >> Speedometer and/or Odometer Inaccurate or Inoperative >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

An improperly operating odometer may be caused by an internal memory fault in the body control module (BCM). Check for DTC B1000 in Body Control Systems.

Speedometer and/or Odometer Inaccurate or Inoperative

Step Action Yes No
Schematic Reference: Instrument Cluster Schematics 
1 Did you perform the Instrument Cluster Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Instrument Cluster 
2
  1. Install a scan tool.
  2. Raise the vehicles drive wheels. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Start the engine.
  4. Place the transmission into drive for an automatic transmission or third gear for a manual transmission.
  5. With the scan tool, observe the Vehicle Speed parameter in the Powertrain Ignition data list.
Does the Vehicle Speed parameter match the speedometer display?		 Go to Step 3  Go to Step 4 
3 Does the odometer operate properly? Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 4 
4 Replace the instrument panel cluster (IPC). Refer to Instrument Panel Cluster (IPC) Replacement .
Did you complete the replacement?		 Go to Step 5  -
5 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 2 
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